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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Photonics Russia</journal-id><journal-title-group><journal-title xml:lang="en">Photonics Russia</journal-title><trans-title-group xml:lang="ru"><trans-title>Фотоника</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1993-7296</issn><issn publication-format="electronic">2686-844X</issn><publisher><publisher-name xml:lang="en">Technosphera JSC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">694227</article-id><article-id pub-id-type="doi">10.22184/1993-7296.FRos.2025.19.6.500.507</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Materials and Coatings</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Материалы и покрытия</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Bimetallic terbium and europium tetrafluoroterephthalates with phenanthroline: photostability and application in thermometry</article-title><trans-title-group xml:lang="ru"><trans-title>Биметаллические тетрафтортерефталаты тербия и европия с фенантролином: фотостабильность и применение в термометрии</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2534-2835</contrib-id><name-alternatives><name xml:lang="en"><surname>Orlova</surname><given-names>Anastasia V.</given-names></name><name xml:lang="ru"><surname>Орлова</surname><given-names>Анастасия Вадимовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD student, Faculty of the Material Science</p></bio><bio xml:lang="ru"><p>асп. 3 г/о, Факультет наук о материалах</p></bio><email>lea.rosa.17@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1250-4017</contrib-id><name-alternatives><name xml:lang="en"><surname>Tcelykh</surname><given-names>Liubov O.</given-names></name><name xml:lang="ru"><surname>Целых</surname><given-names>Любовь Олеговна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD student, Department of Chemistry</p></bio><bio xml:lang="ru"><p>асп. 4 г/о. Химический факультет</p></bio><email>tcelykh@my.msu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8210-6690</contrib-id><name-alternatives><name xml:lang="en"><surname>Koshelev</surname><given-names>Daniil S.</given-names></name><name xml:lang="ru"><surname>Кошелев</surname><given-names>Даниил Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. of Sc. (Chemistry), Junior Research Fellow, Department of Chemistry</p></bio><bio xml:lang="ru"><p>к. х. н., младший научный сотрудник, Химический факультет</p></bio><email>koshelevds@my.msu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0005-2412-9145</contrib-id><name-alternatives><name xml:lang="en"><surname>Bulatov</surname><given-names>Anton V.</given-names></name><name xml:lang="ru"><surname>Булатов</surname><given-names>Антон Витальевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>toni.bulatov.07@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-7108-3455</contrib-id><name-alternatives><name xml:lang="en"><surname>Garbuzova</surname><given-names>Milena R.</given-names></name><name xml:lang="ru"><surname>Гарбузова</surname><given-names>Милена Руслановна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>garbuzovamilenka@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-2582-479X</contrib-id><name-alternatives><name xml:lang="en"><surname>Zezyulya</surname><given-names>Kirill R.</given-names></name><name xml:lang="ru"><surname>Зезюля</surname><given-names>Кирилл Романович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>kirillzezyulya@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-6089-7695</contrib-id><name-alternatives><name xml:lang="en"><surname>Marshev</surname><given-names>Evgenii D.</given-names></name><name xml:lang="ru"><surname>Маршев</surname><given-names>Евгений Дмитриевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>marshev07@bk.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-0425-5046</contrib-id><name-alternatives><name xml:lang="en"><surname>Rubanova</surname><given-names>Lada S.</given-names></name><name xml:lang="ru"><surname>Рубанова</surname><given-names>Лада Сергеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>lada.rubanova.00@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0003-4695-4045</contrib-id><name-alternatives><name xml:lang="en"><surname>Tsymbal</surname><given-names>Timofei L.</given-names></name><name xml:lang="ru"><surname>Цымбал</surname><given-names>Тимофей Леонидович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>cymbalt112@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0830-1268</contrib-id><name-alternatives><name xml:lang="en"><surname>Utocnikova</surname><given-names>Valentina V.</given-names></name><name xml:lang="ru"><surname>Уточникова</surname><given-names>Валентина Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. of Science, Prof. Faculty of the Material Science</p></bio><bio xml:lang="ru"><p>д. х. н., проф. Факультет наук о материалах</p></bio><email>valentina@utochnikova.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет имени М. В. Ломоносова</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Sirius Educational Center</institution></aff><aff><institution xml:lang="ru">Образовательный центр «Сириус»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-10-26" publication-format="electronic"><day>26</day><month>10</month><year>2025</year></pub-date><volume>19</volume><issue>6</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>500</fpage><lpage>508</lpage><history><date date-type="received" iso-8601-date="2025-10-26"><day>26</day><month>10</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-10-26"><day>26</day><month>10</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Orlova A.V., Tcelykh L.O., Koshelev D.S., Bulatov A.V., Garbuzova M.R., Zezyulya K.R., Marshev E.D., Rubanova L.S., Tsymbal T.L., Utocnikova V.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Орлова А.В., Целых Л.О., Кошелев Д.С., Булатов А.В., Гарбузова М.Р., Зезюля К.Р., Маршев Е.Д., Рубанова Л.С., Цымбал Т.Л., Уточникова В.В.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Orlova A.V., Tcelykh L.O., Koshelev D.S., Bulatov A.V., Garbuzova M.R., Zezyulya K.R., Marshev E.D., Rubanova L.S., Tsymbal T.L., Utocnikova V.V.</copyright-holder><copyright-holder xml:lang="ru">Орлова А.В., Целых Л.О., Кошелев Д.С., Булатов А.В., Гарбузова М.Р., Зезюля К.Р., Маршев Е.Д., Рубанова Л.С., Цымбал Т.Л., Уточникова В.В.</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/1993-7296/article/view/694227">https://journals.eco-vector.com/1993-7296/article/view/694227</self-uri><abstract xml:lang="en"><p>The luminescent complexes of terbium and europium with tetrafluoroterephthalic acid and phenanthroline were studied for application in thermometry. It was shown that in contrast to a mixture of individual complexes demonstrating various photodegradation rates, the bimetallic complex retains a stable intensity ratio of the Tb<sup>3+ </sup>and Eu<sup>3+ </sup>emission bandswith a general decrease in the luminescence intensity. The composite materials based on the synthesized complexes in polyimide and polystyrene matrices were developed with simultaneous combination of thermosensitive properties with mechanical stability. The results obtained offer opportunities for the development of stable luminescent thermometers for biological and microelectronic applications.</p></abstract><trans-abstract xml:lang="ru"><p>Исследованы люминесцентные комплексы тербия и европия с тетрафтортерефталевой кислотой и фенантролином для применения в термометрии. Показано, что в отличие от смеси индивидуальных комплексов, демонстрирующих различную скорость фотодеградации, биметаллический комплекс сохраняет стабильное соотношение интенсивностей полос излучения Tb<sup>3+</sup> и Eu<sup>3+</sup> при общем снижении интенсивности люминесценции. Разработаны композитные материалы на основе синтезированных комплексов в полиимидных и полистирольных матрицах, сочетающие термочувствительные свойства с механической устойчивостью. Полученные результаты открывают перспективы создания стабильных люминесцентных термометров для биологических и микроэлектронных применений.</p></trans-abstract><kwd-group xml:lang="en"><kwd>lanthanide complexes</kwd><kwd>luminescent thermometry</kwd><kwd>photodegradation</kwd><kwd>bimetallic complexes</kwd><kwd>polymer composites</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>комплексы лантанидов</kwd><kwd>люминесцентная термометрия</kwd><kwd>фотодеградация</kwd><kwd>биметаллические комплексы</kwd><kwd>полимерные композиты</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The works were performed with the support of the Educational Program in Practical Chemistry implemented at the Sirius Educational Center.</funding-statement><funding-statement xml:lang="ru">Работа выполнена при поддержке Образовательной программы по практической химии, проводимой на базе Образовательного центра Сириус.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Dramićanin M. 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